If by "same result" you mean not winning the Super Bowl, then I agree. But it's safe to say that if either of us were running the team, they'd be in worse shape than they are now.
For one thing, I doubt that either of us keeps an objective list of every single personnel decision and how we felt about it, but we tend to remember the ones where we were right. So the idea that we'd have done better is simple confirmation bias.
Second, nobody on this board knows exactly what a GM does. Yeah, he's in charge of personnel, but we don't know all the intricacies of the business, and we don't have access to the same information that he has.
Like I said before, until you've done the job, you have no idea how difficult it is, and therefore you have no idea how well you'd perform it.